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Adverse selection, credit and efficiency: The case of the missing market

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Abstract

We analyze a standard environment of adverse selection in credit markets. In our environment, entrepreneurs who are privately informed about the quality of their projects need to borrow from banks. Conventional wisdom says that, in this class of economies, the competitive equilibrium is typically inefficient. We show that this conventional wisdom rests on one implicit assumption: entrepreneurs can only borrow from banks. If an additional market is added to provide entrepreneurs with additional funds, efficiency can be attained in equilibrium. An important characteristic of this additional market is that it must be non-exclusive, in the sense that entrepreneurs must be able to simultaneously borrow from many different lenders operating in it. This makes it possible to attain efficiency by pooling all entrepreneurs in the new market while separating them in the market for bank loans.

Suggested Citation

  • Alberto Martin, 2008. "Adverse selection, credit and efficiency: The case of the missing market," Economics Working Papers 1085, Department of Economics and Business, Universitat Pompeu Fabra, revised Sep 2009.
  • Handle: RePEc:upf:upfgen:1085
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    References listed on IDEAS

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    1. Boyd, John H & Smith, Bruce D, 1993. "The Equilibrium Allocation of Investment Capital in the Presence of Adverse Selection and Costly State Verification," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 3(3), pages 427-451, July.
    2. Besanko, David & Thakor, Anjan V., 1987. "Competitive equilibrium in the credit market under asymmetric information," Journal of Economic Theory, Elsevier, vol. 42(1), pages 167-182, June.
    3. Alberto Martin, 2007. "On Rothschild–Stiglitz as Competitive Pooling," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 31(2), pages 371-386, May.
    4. Bisin, Alberto & Rampini, Adriano A., 2006. "Markets as beneficial constraints on the government," Journal of Public Economics, Elsevier, vol. 90(4-5), pages 601-629, May.
    5. Veronica Guerrieri & Robert Shimer & Randall Wright, 2010. "Adverse Selection in Competitive Search Equilibrium," Econometrica, Econometric Society, vol. 78(6), pages 1823-1862, November.
    6. Alberto Bisin & Piero Gottardi, 2006. "Efficient Competitive Equilibria with Adverse Selection," Journal of Political Economy, University of Chicago Press, vol. 114(3), pages 485-516, June.
    7. Bester, Helmut, 1987. "The role of collateral in credit markets with imperfect information," European Economic Review, Elsevier, vol. 31(4), pages 887-899, June.
    8. Pradeep Dubey & John Geanakoplos, 2002. "Competitive Pooling: Rothschild-Stiglitz Reconsidered," The Quarterly Journal of Economics, Oxford University Press, vol. 117(4), pages 1529-1570.
    9. Martin, Alberto, 2009. "A model of collateral, investment, and adverse selection," Journal of Economic Theory, Elsevier, vol. 144(4), pages 1572-1588, July.
    10. Douglas Gale, 1992. "A Walrasian Theory of Markets with Adverse Selection," Review of Economic Studies, Oxford University Press, vol. 59(2), pages 229-255.
    11. Hellwig, Martin, 1987. "Some recent developments in the theory of competition in markets with adverse selection ," European Economic Review, Elsevier, vol. 31(1-2), pages 319-325.
    12. Stiglitz, Joseph E & Weiss, Andrew, 1981. "Credit Rationing in Markets with Imperfect Information," American Economic Review, American Economic Association, vol. 71(3), pages 393-410, June.
    13. Bester, Helmut, 1985. "Screening vs. Rationing in Credit Markets with Imperfect Information," American Economic Review, American Economic Association, vol. 75(4), pages 850-855, September.
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    Cited by:

    1. Anastasios Dosis, 2016. "Investment, Adverse Selection and Optimal Redistributive Taxation," Working Papers hal-01285163, HAL.
    2. Dosis, Anastasios, 2016. "Investment, Adverse Selection and Optimal Redistributive Taxation," ESSEC Working Papers WP1605, ESSEC Research Center, ESSEC Business School.
    3. Gormley, Todd A., 2014. "Costly information, entry, and credit access," Journal of Economic Theory, Elsevier, vol. 154(C), pages 633-667.

    More about this item

    Keywords

    Adverse Selection; Credit Markets; Collateral; Screening;

    JEL classification:

    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • G20 - Financial Economics - - Financial Institutions and Services - - - General
    • D62 - Microeconomics - - Welfare Economics - - - Externalities

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